Angle-cock for air-brake systems.



vNN 949,199. PATENTEDAPRN 2.41997.

- J. A. BENNETT. Y l ANGLE 909K PoR AIN BRAKE SYSTEMS.`

APPLIOATION FILN NOY- '1. 190e. j

FFTCE.

JOSEPH A. BENNETT, OF YOUNGWOOD, PENNSYLVANIA.

ANGLE-COCK FOR AIR-BRAKE SYSTEMS.

Specification of `Letters Patent.

Patented April 2, 1907.

Application led November '7, 1906. Serial No, 342,398.

To all 11i/"wm, it may concern.'

Be it known that l, JOSEPH A. BENNETT, a citizen of the United States of America, residing at Youngwood, in the county of Vestmoreland and State of Pennsylvania, have invented new and useful Improvements in Angle-Cocks for Air-Brake Systems, of which the following isa specification.

This invention relates to angle-cocks for air-brake systems, and one of the principal objects of the same is to provide reliable and efficient means for preventing accidents due to the turning of the angle-cock handle either by accident or by design.

Another object of my invention is to provide an angle-cock with means for bleeding the train-line back of the angle-cock whenever said angle-cock is set to cut off communication between any two cars in the train.

Another object of my invention is to provide an angle-cock with a by-pass tube which will communicate at one end with the trainpipe, while the other end ofl said tube will communicate with the atmosphere to reduce the train-line gradually to set the brakes in rear of the angle-cock, which may be turned by accident or design to cut off` communication between any two cars of the train.

These and other objects may be attained by means of the construction illustrated in the accompanying drawings, in which- Figure 1 is a side elevation of an anglecock made in accordance with my invention. Fig. 2 is a vertical section of the same, taken on the line 2 2, Fig. 3. Fig. 3 is a longitudi- 'nal section taken on the line 3 3, Fig. 2.

Referring to the drawings for a more particular description of my invention, the nu-' meral 1 designates the casting of the cock, having a threaded opening 2 therein, which communicates with .the train-line, and a threaded portion 3, which communicates with the flexible hose which is coupled together between the cars. The casting 1 is provided with a flaring bore 4, provided with abushing 5, said bushing being seated permanently within the bore and provided with openings 6 and 7, which communicate with the passages 8 and 9 through the angle-cock. The bushing 5 is also provided with an airpocket 10, which communicates with an outlet-port 11, extending through one of the side walls of the casting 1 and communicating with the outer atmosphere. Fitted in the bushing 5 is a hollow key 12, said key having a squared or polygonal upper end 13, to which a handle 14 is permanently fitted by means of a pin 16 or other suitable means. 4The key 12 is provided with oppositely-disposed apertures or ports 17, which are adapted to be turned to communicate with the openings 8 and 9 in the angle-cock to supply the trainline with air. A by-pass tube 18 extends across the key 12 and establishes communication between the opening 9 and the pocket 10 and the outlet 11 when the ports 17 are disposed laterally of the cock or in the position shown in Fig. 3. The ends of' the bypass tube 18 are flush with the outer surface of the key 12. The lower end of the key 12 is fitted with a cap-nut 19 of usual construction.

The operation of my invention may be briefly described as follows: Whenever the key of the angle-cock is turned, by accident or design, to cut ofl' communication between the front end 8 of the cock and the rear end 9, it will be seen that the by-pass tube 18 is placed in communication with the end 9, and the air from the train-line at that end gradually escapes through the by-pass tube 18 and to the atmosphere through pocket 10 and outlet 11, the result of which is that the brakes in rear of the angle-cock are s'et, so that the train cannot be started until the angle-cock is again turned to place the opening 17 in communication with the train-line.

From the foregoing it will be obvious that my angle-cock improvements may be applied to an ordinary angle-cock with very slight alteration. The by-pass tube 18 may be connected to the ordinary key 12 of an angle-cock and the pocket l() and outlet 11, formed in the casting of the cock, thus adding my improvement to the ordinary anglecock, and thus obviating many accidents which happen owing to the accidental turning of the handle of angle-cocks as at present in use. l

Having thus described the invention, what I claim is-- 1. ln Van angle-cock, a by-pass tube eX- tending across the key and communicating with one of the openings in said cock, and with the atmosphere when said key is turned to cut off communication'between said anglecock and the train-line.

2. An angle-cock com rising the casting, a bushing fitted into the ore of said casting and provided with openings which are disposed in alinement with the openings in IOO ITO

said casting, a key fitted to rotate in'said bushing and provided With openings in the' opposite Walls thereof adapted to be turned in alinement With the openings in the bushing, and a' by-pass tube extending through the Walls of said key intermediate the openings therein, said by-pass tube adapted to communicate with one of the openings in the bushing and With an air-pocket in the Wall of said bushing disposed in communication With an outleteopening in the casting.

3. In an angle-oook, a key tted to the @ook and provided With a by-pass tube opening in a pocket communicating With the outer air.

LL An angle-oook comprising a casting, a tapering bore therein, a bushing Jiitted to said bore and provided with openings in alinernent with the openings in the casting, a key itted t0 turn in said bushing andpro vided With openings adapted to be turned into alinernent With the openings in the bush ing, and a by-pass tube extending through the Walls of the key intermediate the openings therein, the ends of the tube being Hush With the outer surface of said key, and an air-pocket formed in the bushing and communicating with an` outlet formed in the casting.

In testimony whereof I a'HiX my signature in presence of two Witnesses.

JOSEPH A. BENNETT.

Witnesses:

JOHN L. FLETCHER, C. C. HINEs. 

